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Aetiocetus is a genus of extinct basal mysticete, or baleen whale that lived 33.9 to 23.03 million years ago, in the Oligocene in the North Pacific ocean, around Japan, Mexico, and Oregon, U.S. It was first described by Douglas Emlong in 1966 and currently contains known four species, A. cotylalveus, A. polydentatus, A. tomitai, and A. weltoni. These whales are remarkable for their retention of teeth and presence of nutrient foramina, indicating that they possessed baleen. Thus, Aetiocetus represents the transition from teeth to baleen in Oligocene mysticetes. Baleen is a highly derived character, or synapomorphy, of mysticetes, and is a keratinous structure that grows from the palate, or roof of the mouth, of the whale. The presence of baleen is inferred from the fossil record in the skul

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rdf:type
rdfs:label
  • Aetiocetus
  • Aetiocetus
  • Aetiocetus
  • Aetiocetus
  • Aetiocetus
  • Aetiocetus
  • Aetiocetus
  • 艾什歐鯨
rdfs:comment
  • Aetiocetus és un gènere extint de balena que visqué fa 25 milions d'anys, durant l'Oligocè.
  • Aetiocetus est un genre éteint de cétacés qui a vécu lors de l’Oligocène (-33,9 à -23,03 Ma). Ses restes fossiles ont été mis au jour dans le nord de l’océan Pacifique.
  • Aetiocetus is een geslacht van uitgestorven baleinwalvissen die 25 miljoen jaar geleden, in het Oligoceen, leefden.
  • L'etioceto (gen. Aetiocetus è un cetaceo estinto, ritenuto un antenato delle balene. Visse nell'Oligocene superiore (circa 25 milioni di anni fa nell'area del Pacifico settentrionale; i suoi resti fossili furono ritrovati per la prima volta in Oregon.
  • 艾什歐鯨(Aetiocetus)是已滅絕的鬚鯨,生存於漸新世的美國俄勒岡州。牠是介乎巴基鯨及現今灰鯨的過渡性化石。
  • Aetiocetus (лат.) — род вымерших млекопитающих из парвотряда усатых китов (Mysticeti), живших в олигоцене. Их остатки были найдены в северной части Тихого океана у берегов Орегона. Название дано Дугласом Эмлонгом в 1966 году.
  • Aetiocetus is a genus of extinct basal mysticete, or baleen whale that lived 33.9 to 23.03 million years ago, in the Oligocene in the North Pacific ocean, around Japan, Mexico, and Oregon, U.S. It was first described by Douglas Emlong in 1966 and currently contains known four species, A. cotylalveus, A. polydentatus, A. tomitai, and A. weltoni. These whales are remarkable for their retention of teeth and presence of nutrient foramina, indicating that they possessed baleen. Thus, Aetiocetus represents the transition from teeth to baleen in Oligocene mysticetes. Baleen is a highly derived character, or synapomorphy, of mysticetes, and is a keratinous structure that grows from the palate, or roof of the mouth, of the whale. The presence of baleen is inferred from the fossil record in the skul
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